## What this PR does
Closes#13869
Adds a global setting to toggle image anti-aliasing in AFFiNE.
When disabled, images are rendered using nearest-neighbor scaling
(`image-rendering: pixelated`), preserving crisp pixels for pixel art,
sprites, icons, and low-resolution images.
## Why
Anti-aliasing causes small images to become blurry when scaled,
making it difficult to work with pixel art and technical assets.
## How to test
1. Open Settings → Appearance → Images
2. Toggle “Smooth image rendering”
3. Observe image scaling behavior:
- ON: smooth / anti-aliased
- OFF: pixelated / nearest-neighbor
## Notes
- Frontend-only change
- No backend required
# BEFORE
<img width="1911" height="909" alt="Screenshot 2026-01-18 202651"
src="https://github.com/user-attachments/assets/a40816c3-93fa-416d-90ec-38a919da182f"
/>
# AFTER
<img width="1919" height="910" alt="Screenshot 2026-01-18 202705"
src="https://github.com/user-attachments/assets/19fc348b-5f14-4e32-b6a8-a0905e569af5"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added an Images section in Appearance with a toggle to switch image
antialiasing on/off (setting is persisted).
* **Style**
* When antialiasing is turned off, images render with pixelated scaling
for a crisp, non-smoothed look.
* **Localization**
* Added English labels and description for the new Images and
antialiasing options.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: DarkSky <25152247+darkskygit@users.noreply.github.com>
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